include/asm-sparc64/processor.h

   1 /* $Id: processor.h,v 1.57 1999/08/04 03:20:05 davem Exp $
   2  * include/asm-sparc64/processor.h
   3  *
   4  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6
   7 #ifndef __ASM_SPARC64_PROCESSOR_H
   8 #define __ASM_SPARC64_PROCESSOR_H
   9
  10 /*
  11  * Sparc64 implementation of macro that returns current
  12  * instruction pointer ("program counter").
  13  */
  14 #define current_text_addr() ({ void *pc; __asm__("rd %%pc, %0" : "=r" (pc)); pc; })
  15
  16 #include <asm/asi.h>
  17 #include <asm/a.out.h>
  18 #include <asm/pstate.h>
  19 #include <asm/ptrace.h>
  20 #include <asm/signal.h>
  21 #include <asm/segment.h>
  22
  23 /* Bus types */
  24 #define EISA_bus 0
  25 #define EISA_bus__is_a_macro /* for versions in ksyms.c */
  26 #define MCA_bus 0
  27 #define MCA_bus__is_a_macro /* for versions in ksyms.c */
  28
  29 /* The sparc has no problems with write protection */
  30 #define wp_works_ok 1
  31 #define wp_works_ok__is_a_macro /* for versions in ksyms.c */
  32
  33 /* User lives in his very own context, and cannot reference us. */
  34 #ifndef __ASSEMBLY__
  35 #define TASK_SIZE       ((unsigned long)-PGDIR_SIZE)
  36 #else
  37 #define TASK_SIZE       0xfffffffc00000000
  38 #endif
  39
  40 #ifndef __ASSEMBLY__
  41
  42 #define NSWINS          7
  43
  44 typedef struct {
  45         unsigned char seg;
  46 } mm_segment_t;
  47
  48 /* The Sparc processor specific thread struct. */
  49 struct thread_struct {
  50         /* D$ line 1 */
  51         unsigned long ksp __attribute__ ((aligned(16)));
  52         unsigned char wstate, cwp, flags;
  53         mm_segment_t current_ds;
  54         unsigned char w_saved, fpdepth;
  55         unsigned char fpsaved[7];
  56         unsigned char __pad1[3];
  57         struct pt_regs *kregs;
  58
  59         /* D$ line 2 */
  60         unsigned long *utraps;
  61         unsigned char gsr[7];
  62         unsigned char __pad2;
  63         unsigned long sig_address;
  64         unsigned long sig_desc;
  65
  66         /* D$ lines 3 and 4 */
  67         unsigned long xfsr[7];
  68         unsigned long __pad3;
  69
  70         struct reg_window reg_window[NSWINS];
  71         unsigned long rwbuf_stkptrs[NSWINS];
  72
  73         /* Performance counter state */
  74         u64 *user_cntd0, *user_cntd1;
  75         u64 kernel_cntd0, kernel_cntd1;
  76         u64 pcr_reg;
  77 };
  78
  79 #endif /* !(__ASSEMBLY__) */
  80
  81 #define SPARC_FLAG_UNALIGNED    0x01    /* is allowed to do unaligned accesses */
  82 #define SPARC_FLAG_NEWSIGNALS   0x02    /* task wants new-style signals */
  83 #define SPARC_FLAG_32BIT        0x04    /* task is older 32-bit binary */
  84 #define SPARC_FLAG_NEWCHILD     0x08    /* task is just-spawned child process */
  85 #define SPARC_FLAG_PERFCTR      0x10    /* task has performance counters active */
  86
  87 #define INIT_MMAP { &init_mm, 0xfffff80000000000, 0xfffff80001000000, \
  88                     NULL, PAGE_SHARED , VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
  89
  90 #define INIT_THREAD  {                                  \
  91 /* ksp, wstate, cwp, flags, current_ds, */              \
  92    0,   0,      0,   0,     KERNEL_DS,                  \
  93 /* w_saved, fpdepth, fpsaved, pad1,  kregs, */          \
  94    0,       0,       { 0 },   { 0 }, 0,                 \
  95 /* utraps, gsr,   pad2,  sig_address, sig_desc, */      \
  96    0,      { 0 }, 0,     0,           0,                \
  97 /* xfsr,  pad3, */                                      \
  98    { 0 }, 0,                                            \
  99 /* reg_window */                                        \
 100    { { { 0, }, { 0, } }, },                             \
 101 /* rwbuf_stkptrs */                                     \
 102    { 0, 0, 0, 0, 0, 0, 0, },                            \
 103 /* user_cntd0, user_cndd1, kernel_cntd0, kernel_cntd0, pcr_reg */ \
 104    0,          0,          0,            0,            0, \
 105 }
 106
 107 #ifndef __ASSEMBLY__
 108
 109 /* Return saved PC of a blocked thread. */
 110 extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t)
 111 {
 112         unsigned long *sp = (unsigned long *)(t->ksp + STACK_BIAS);
 113         unsigned long *fp = (unsigned long *)(sp[14] + STACK_BIAS);
 114
 115         return fp[15];
 116 }
 117
 118 /* On Uniprocessor, even in RMO processes see TSO semantics */
 119 #ifdef __SMP__
 120 #define TSTATE_INITIAL_MM       TSTATE_TSO
 121 #else
 122 #define TSTATE_INITIAL_MM       TSTATE_RMO
 123 #endif
 124
 125 /* Do necessary setup to start up a newly executed thread. */
 126 #define start_thread(regs, pc, sp) \
 127 do { \
 128         regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (ASI_PNF << 24); \
 129         regs->tpc = ((pc & (~3)) - 4); \
 130         regs->tnpc = regs->tpc + 4; \
 131         regs->y = 0; \
 132         current->thread.wstate = (1 << 3); \
 133         if (current->thread.utraps) { \
 134                 if (*(current->thread.utraps) < 2) \
 135                         kfree (current->thread.utraps); \
 136                 else \
 137                         (*(current->thread.utraps))--; \
 138                 current->thread.utraps = NULL; \
 139         } \
 140         __asm__ __volatile__( \
 141         "stx            %%g0, [%0 + %2 + 0x00]\n\t" \
 142         "stx            %%g0, [%0 + %2 + 0x08]\n\t" \
 143         "stx            %%g0, [%0 + %2 + 0x10]\n\t" \
 144         "stx            %%g0, [%0 + %2 + 0x18]\n\t" \
 145         "stx            %%g0, [%0 + %2 + 0x20]\n\t" \
 146         "stx            %%g0, [%0 + %2 + 0x28]\n\t" \
 147         "stx            %%g0, [%0 + %2 + 0x30]\n\t" \
 148         "stx            %%g0, [%0 + %2 + 0x38]\n\t" \
 149         "stx            %%g0, [%0 + %2 + 0x40]\n\t" \
 150         "stx            %%g0, [%0 + %2 + 0x48]\n\t" \
 151         "stx            %%g0, [%0 + %2 + 0x50]\n\t" \
 152         "stx            %%g0, [%0 + %2 + 0x58]\n\t" \
 153         "stx            %%g0, [%0 + %2 + 0x60]\n\t" \
 154         "stx            %%g0, [%0 + %2 + 0x68]\n\t" \
 155         "stx            %1,   [%0 + %2 + 0x70]\n\t" \
 156         "stx            %%g0, [%0 + %2 + 0x78]\n\t" \
 157         "wrpr           %%g0, (1 << 3), %%wstate\n\t" \
 158         : \
 159         : "r" (regs), "r" (sp - REGWIN_SZ - STACK_BIAS), \
 160           "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
 161 } while(0)
 162
 163 #define start_thread32(regs, pc, sp) \
 164 do { \
 165         pc &= 0x00000000ffffffffUL; \
 166         sp &= 0x00000000ffffffffUL; \
 167 \
 168         regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM); \
 169         regs->tpc = ((pc & (~3)) - 4); \
 170         regs->tnpc = regs->tpc + 4; \
 171         regs->y = 0; \
 172         current->thread.wstate = (2 << 3); \
 173         if (current->thread.utraps) { \
 174                 if (*(current->thread.utraps) < 2) \
 175                         kfree (current->thread.utraps); \
 176                 else \
 177                         (*(current->thread.utraps))--; \
 178                 current->thread.utraps = NULL; \
 179         } \
 180         __asm__ __volatile__( \
 181         "stx            %%g0, [%0 + %2 + 0x00]\n\t" \
 182         "stx            %%g0, [%0 + %2 + 0x08]\n\t" \
 183         "stx            %%g0, [%0 + %2 + 0x10]\n\t" \
 184         "stx            %%g0, [%0 + %2 + 0x18]\n\t" \
 185         "stx            %%g0, [%0 + %2 + 0x20]\n\t" \
 186         "stx            %%g0, [%0 + %2 + 0x28]\n\t" \
 187         "stx            %%g0, [%0 + %2 + 0x30]\n\t" \
 188         "stx            %%g0, [%0 + %2 + 0x38]\n\t" \
 189         "stx            %%g0, [%0 + %2 + 0x40]\n\t" \
 190         "stx            %%g0, [%0 + %2 + 0x48]\n\t" \
 191         "stx            %%g0, [%0 + %2 + 0x50]\n\t" \
 192         "stx            %%g0, [%0 + %2 + 0x58]\n\t" \
 193         "stx            %%g0, [%0 + %2 + 0x60]\n\t" \
 194         "stx            %%g0, [%0 + %2 + 0x68]\n\t" \
 195         "stx            %1,   [%0 + %2 + 0x70]\n\t" \
 196         "stx            %%g0, [%0 + %2 + 0x78]\n\t" \
 197         "wrpr           %%g0, (2 << 3), %%wstate\n\t" \
 198         : \
 199         : "r" (regs), "r" (sp - REGWIN32_SZ), \
 200           "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
 201 } while(0)
 202
 203 /* Free all resources held by a thread. */
 204 #define release_thread(tsk)             do { } while(0)
 205
 206 extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
 207
 208 #define copy_segments(tsk, mm)          do { } while (0)
 209 #define release_segments(mm)            do { } while (0)
 210 #define forget_segments()               do { } while (0)
 211
 212 #ifdef __KERNEL__
 213 #define THREAD_SIZE (2*PAGE_SIZE)
 214 /* Allocation and freeing of task_struct and kernel stack. */
 215 #define alloc_task_struct()   ((struct task_struct *)__get_free_pages(GFP_KERNEL, 1))
 216 #define free_task_struct(tsk) free_pages((unsigned long)(tsk),1)
 217
 218 #define init_task       (init_task_union.task)
 219 #define init_stack      (init_task_union.stack)
 220
 221 #endif /* __KERNEL__ */
 222
 223 #endif /* !(__ASSEMBLY__) */
 224
 225 #endif /* !(__ASM_SPARC64_PROCESSOR_H) */